ABSTRACT: Corylus avellana L., anut cultivar indigenous to Black Sea region of Turkey, is able to relese more than 10.000 tons of nut leaf and 300.000 tons of green nut Shell annually. Objective of this study was to determine biologic activities of nut leaf and green Shell. In this study, to attain their extracts, green nut shell and nut leaf were treated with methanol in room temperature for 72 hours. Antibacterial activity of extracted substances were analyzed via eight different bacterial strains according to agar well diffusion method. The DPPH (1,1-diphenyl-2-pikrilhydrazyl) method was used for determining the antiradical activity. In this study, the DNA productive activity of extracts were determined by the DNA of the pBR322 plasmid at the end of exposing them to H2O2 and UV-C. As a result of the study, it was determined that hazelnut green leaf and shell showed antiradical activity and antibacterial activities to lots of bacteria. Hazelnut green shell demonstrated a protective potential on DNA against to UV-C and H2O2, but this activity was not the case for hazelnut green leaf.